She won 4 gold medals in (200 m, 100 m, 50m breaststroke and 4 × 100 m medley) at the 2015 European Games.

In 2014, Astashkina competed at the 2014 European Junior Championships winning 4 gold medals in (200 m, 100 m, 50m breaststroke and 4 × 100 m medley), that same year, she competed in seniors at the 2014 European Championships and at the 2014 FINA World Swimming Championships (25 m) in Doha, Qatar where she qualified for the finals in 200 m breaststroke finishing in 6th place and with Team Russia finishing 5th in 4 × 100 m women's medley.

In June 2015, 16 year old Astashkina was selected to compete at the inaugural 2015 European Games in Baku, where she won four gold medals, in (200m, 100 m, 50m breaststroke), in 4 × 100 m medley (with Arina Openysheva, Polina Egorova and Maria Kameneva broke a new junior world record touching in at 4:03.22).

[2] On August 2–9, Astashkina competed in seniors at the 2015 World Championships in Kazan, however she did not reach the semifinals after losing in her preliminary heats.

She won a bronze medal in 200 m breastroke but she did not comply required time to qualify at the Olympics.